Home Study Companion: Precalculus; video course for homeschoolers and adult learners Video lectures for a full year course in Precalculus for homeschoolers and self-teaching adults. Video solution guide for all assigned problems (about 1/2 of the problems in the text). Designed to accompany the text Precalculus with Trigonometry: Concepts, and Applications by Paul A. Foerster. Presented by David Chandler, with 35 years experience teaching physics and mathematics. This is not a "watered down" course for homeschoolers. It is solid teaching by an experienced teacher using one of the most respected textbooks in the field.